Cannon to kill a mosquito

A friend of mine recently travelled via Hong Kong and was somewhat surprised that she was confronted by officials wielding infrared thermometers. Indeed it is becoming more and more difficult to avoid being scanned entering Hong Kong as the city has strengthened its defences against bird flu. Of course there is nothing wrong with being on the safe side, but the measures taken to scan travellers and the possibility that a slight raise in body temperature due to a common cold can potentially cause